My 2007 ES-350 has 151K miles on it. Took it to a dealer until 120K and then found a really good mechanic that works on it now. It has been a great car but recently started having front end issues.

I was getting a bad vibration at 55 plus mph. That was a fiasco to get fixed. These are all the thing in order I had to replace to fix the vibration/shimmy over a 6 month period.

New Tires
Two new control arms
CV joints
Front left axle.

Finally have the vibration/shimmy fixed. However, I started noticing a different problem some months back but was hard to diagnose with all the front end issues. Now that those are fixed there is a random flutter or shake that comes and goes depending on speed, if I'm going uphill or accelerating during a turn. It only happens when my foot is on the accelerator. It's often more pronounced at lower speeds. I asked them to check the struts and they said I had two that were leaking, but my mechanic thinks it might be the transmission. But I am only familiar with transmissions slipping in and out of gear. This is not the case. I have also noticed recently that it is coming more frequent and will soon be a consistent problem.

I am thinking of taking git the dealer to get it diagnosed.

Thanks!

 

Does it become worse with more throttle/heavier acceleration? Are there any vibrations at idle? Is there any clicking sounds while turning?
It could be the axle is bad, either the new one or the one that wasn't replaced.

 

No vibrations at idle. Car engine is smooth and quiet. It's hard to tell where its coming from. My wife says it feels like its coming from the rear of the car and she drives it more than me. It's very random and not consistent, but recently we are starting to feel it more. Especially at lower speed when we begin to accelerate around 35 - 45 mph. At hwy speeds you do not feel it so much. No clicking sounds while turning. With all the recent work the steering is tighter and more responsive. I also feel more of the road but that could be these Bridgestone tires. They are not too soft.